What is 2231 in Military Time?
2231 military time equals
10:31 PM
How to Convert 2231
2231 falls after noon on the 24-hour clock, so the rule is: subtract 12 from the hour and add PM.
22 − 12 = 10 → 10:31 PM (the minutes, 31, stay exactly the same).
Going the other way: 10:31 PM + 12 = 2231. Or skip the math — type 2231 into the military time converter and convert any time instantly on the home page.
Times Around 2231
See the whole day on one page: Military Time Chart or view the full 24-hour chart.
All Times From 2200 to 2259
Every minute of this hour has its own quick answer page:
- 2200 10:00 PM
- 2201 10:01 PM
- 2202 10:02 PM
- 2203 10:03 PM
- 2204 10:04 PM
- 2205 10:05 PM
- 2206 10:06 PM
- 2207 10:07 PM
- 2208 10:08 PM
- 2209 10:09 PM
- 2210 10:10 PM
- 2211 10:11 PM
- 2212 10:12 PM
- 2213 10:13 PM
- 2214 10:14 PM
- 2215 10:15 PM
- 2216 10:16 PM
- 2217 10:17 PM
- 2218 10:18 PM
- 2219 10:19 PM
- 2220 10:20 PM
- 2221 10:21 PM
- 2222 10:22 PM
- 2223 10:23 PM
- 2224 10:24 PM
- 2225 10:25 PM
- 2226 10:26 PM
- 2227 10:27 PM
- 2228 10:28 PM
- 2229 10:29 PM
- 2230 10:30 PM
- 2231 10:31 PM
- 2232 10:32 PM
- 2233 10:33 PM
- 2234 10:34 PM
- 2235 10:35 PM
- 2236 10:36 PM
- 2237 10:37 PM
- 2238 10:38 PM
- 2239 10:39 PM
- 2240 10:40 PM
- 2241 10:41 PM
- 2242 10:42 PM
- 2243 10:43 PM
- 2244 10:44 PM
- 2245 10:45 PM
- 2246 10:46 PM
- 2247 10:47 PM
- 2248 10:48 PM
- 2249 10:49 PM
- 2250 10:50 PM
- 2251 10:51 PM
- 2252 10:52 PM
- 2253 10:53 PM
- 2254 10:54 PM
- 2255 10:55 PM
- 2256 10:56 PM
- 2257 10:57 PM
- 2258 10:58 PM
- 2259 10:59 PM
When You'll See 2231
Wind-down. Evening shifts that end around 2230 or 2300 make 2231 (10:31 PM) a common end-of-day timestamp on logs, closing checklists, and late transit timetables.
To say it out loud, read the two pairs: "twenty-two thirty-one." In formal military usage you may also hear "twenty-two hundred thirty-one hours."
Frequently Asked Questions
Is 2231 AM or PM?
PM. Any military time from 1300 to 2359 is afternoon or evening. 2231 = 10:31 PM.
How do you say 2231 in military time?
"Twenty-two thirty-one." Whole hours get the "hundred" treatment (2200 is "twenty-two hundred"), but with minutes you read the two pairs.
What is 10:31 PM in military time?
2231. Add 12 to any PM hour: 10 + 12 = 22, so 10:31 PM becomes 2231.
Is 2231 the same as 22:31?
Yes — same time, two writing styles. Schedules in military format drop the colon (2231); European-style 24-hour clocks keep it (22:31). Both mean 10:31 PM.